Pile-cutting mechanism for double-fabric looms



Dec. 18, 1928.

W. W. ROBERTSON FILE CUTTING MECHANISM FOR DOUBLE FABRIC LOOMS Filed Aug. 9, 1927 Patented Dec. 18, 1928. I v r UNITED stares rarest series.

WILLIAM W. ROBERTSON, OF WORCESTER, MASSACHUSETTS, ASSIG-NOB T CRUD/I."- TON & KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORA- TION OF MASSACHUSETTS. I I

FILE-CUTTING MECHANISM FOR DOUBLE-FABRIG' LOOMS.

Application filed August 9, 1927, Serial No. 211,815.

This invention. relates to mechanism for the breast beam 11. while the other fabric is. 55

cutting the pile in a loom adapted to weave spaced above the breast beam, the two portwo pile fabrics face to face, such looms belions of the fabric being separated to permit ing used for instance in the manufacture of operation of the cutting mechanism between pile carpets. them. 7

It is the general object of my invention A cord or cable is secured at one end to provide improved mechanism for cutting to one end of the sliding block 16, as indithe pile, as the fabric is manufactured and rated at 30 in Fig. 3. The cable 25 then before the fabric leaves the loom. passes around a fixed guide pulley 31 at the 10 A further-object is to. provide mechanism left hand side of the loom and returns to aby which the two piles will be cut of uniguide pulley 32 on the sliding block 16. form length and by the use of which the The cable then passes around the pulley 21 waste in finishing will be reduced to a miniwhich supports the cutting disc 20 and is mum. then engaged by a second guide pulley 33 15 My inventionfurther relates to arrangeon the biocl 16. From the pulley the ments and combinations of parts which will cable is led to a fixed guide pulley 34 (Figs.

be hereinafter described and more particue 9 and atthe opposite side of the loom,

larly pointed out in the appended claims. from which it passes one or more times preferred form of the] invention is around a drum 35 mounted on a shaft 36 ro- 20 shown in the ClI'ELWID S in which tatable in bearings in the loom frame 10. b a

Fig. 1 is a sectional side elevation of The outer end of the shaft 36 may be supparts of a loom, embodying my iinproveported in a bracket 31 positioned outside of ments; the loom frame and independently mounted. Fig. 2 1s a front elevation of the mecharem the drum 35 the cable-25 passes to a 25 nism shown in Fig. 1"; guide pulley 3.8 (Fig. and thence to an Fig. 3 is a plan view, partly diagrammatic, attachment point 39 on the right hand end and showing the operation of my cutting of the block 16. A. tightening roll 40 (Fig. mechanism; 3) is mounted on a, bell crank 41 pivoted at Fig. 4 is an enlarged plan view of the slid- 1-2 to the breast beam 11 and forced yield-- 3e ing block and the rotary cutter mounted ingly against the cable 525 by a spring43.

thereon; A pinion 15 (Figs 1 and 2) is fixed to the 5 Fig. 5 is a sectional side elevation taken suaft 36 and is engaged by a segment gear along the line 55 in Fig. 4, and 16 pivoted are? on the bracket 37 and hav- Fig. 6 is an enlarged side view of the cutir an offset arm43 extending upwardly 35 ter. looking in the direction of the arrow 6 from said gear and connected. by a link 49 in Fig. 1. to a crank pin 50 on a crank arm 51 secured Referring to the drawings, I have shown to a, continuously rotated shaft- 52, which portions of a loom frame 10 having a breast 'may be the usual bottom or cam shaft of the beam 11 and guide-rolls 12, 13 and 14; for loo'in' 40 the upper and lower fabrics. A clove-tailed Haring described the details of construcQ 'guide-way 15 is formed in the upper face of tion of my invention, the method of opera the breast beam 11 and a cutter block 16 is tion thereof is as follows: Asthe shaft 52 slidably mounted in the guide-way 15. rotates, the segment gear 416 is oscillated, ro-

A cutter disc 20 is mounted on a sheave tating the pinion 45 and drum 35 alternate- 45 or pulley 21 pivoted on a stud 253 secured to ly in opposite directions. Such alternate an arm 23 projecting rearward from the movements of the drum 35 cause the bloclc block 16. The disc 20 is positioned at such 1 to be drawn backward and forward across an elevation that it will engage the pile the breast beam 11 from side to side of the mid-way between the upper and lower surfabric.

50 faces of the fabric F, separating the fabric As the blockis thus moved in opposite into upper and lower parts F and F The directions, the cable 25 will be simultaneouslower part F is guided over the roll 12, 1y drawn aroundthe pulley 2'1, rapidly rowhile the upper part F is guided by the vtating the cutter 20 in one directionor the rolls 13 and 14. One fabric passesbelow other, and causing the cutter to sever the pile at a point mid-way between the upper and lower surfaces of the fabric F adjacent the point of weaving of the fabric and betore the fabric is taken from the loom.

The cutter 20, rotating at high speed it is drawn across the loom 51 an side to side of the fabric, accurately cuts the pile in the ')1'edctermined plane and produces a pile of unitorm hei, ht on both th upper and lower :lfabrie, thus greatly reducing the waste, as the fabric must be trimmed to the length of the shortest pile.

Havin thus described my invention and the advantages thereof, ll do not Wish to be limited to the details herein disclosed otherwise than set forth in the claims, but what I claim is:

' 1. In a loom for weaving double pile labric, a rotatable cutter, a support for said cutter, and means to reciprocate said support and cutter across the loom between the upper and lower plies of said fabric, said reciprocating means directly engaging and simultaneously rotating said cutter.

2. In a loom for weaving double pile tabric, arotatable cutter, a simport for said cutter, a single cable effective to reciprocate said support across the loom letween the upper and lower plies of said fabric, and means to move said cable alternately in opposite directions, said cable being also effective to retate said cutter by direct engagement therewith as said support is reciprocated.

8. In a loom for weaving double pile fabric, a rotatable cutter, a support for said itter, a fixed guideway in which said support is slidable, guide-rolls on said support, a pulleyonsaid cutter, guide-rolls at the opposite sides of the loom, drum rotatable alternately in opposite directions, and a single cable having its ends secured to said support and having its intermediate portions passing around said guide pulleys, said outter pulley and said driving drum,whereby said cable is effective to reciprocate said outter support and to alternately rotate said cutter in opposite directions,

In a pile thread cutter for looms, a rotatable cutter, a movable carrier therefor,

and a flexible driver for said cutter and carrier having two different portions thereof moving in opposite directions at the same time, one of said portions being; effective to move the carrier and cutter bodily with re spect to the fabric being: woven and the other portion beingeffective to rotate the cutter by direct engagement therewith,

5. In a pile thread cutter tor looms, a ro tatable cutter, a carrier therefor movable with respect to the fabric being; woven, and a driving mend; r for said carr'er and cutter having two dillerent portio .s thereof movable in opposite directions at the same time, one portion effective to 'move the carrier in one direction and the other portion being operatively related to the cutter to cause rotation of the latter as the carrier moves.

6. In a pile thread cutter for looms, a retary cutter, a arrier therefor, and a single means for moving the carrier and rotating the cutter, said means being etfective to move the carrier and cutter rclativelyto the fabric being woven and having a portion thereof directly engaging the cutter and causing); rotation 01" the cutter as the carrier moves.

7. In a pile thread cutter for looms, a 1'0- tary cutter, a carrier therefor, a flexible driv er for said cutter bent back on lit to cause one portion to move in a direction opposite the direction in which the carrier moves, and means to establish direct operative connection between the cutter and said portion of the driver to cause rotation of the cutter as the carrier moves. r

8. In yarn cutting; mechanism for looms, rotary cutting mechanism, amovable sup port therefor, and flexible means connected to said support and in driving engagement with a part of the cutting mechanism and eltective to move the support relatively to the fabric and to rotate the cutte by reason of the direct engagement between said flexible means and the cutting mechanism.

ln'testimony whereof I have hereunto affixed my signature.

NVILLIAM lV. ROBERTSON. 

